A colony of bacteria has 10,000 bacteria and is growing exponentially. The inequality 10,000(4x) ≥ 320,000 represents the hours, x, for which the colony will have at least 320,000 bacteria. Which interval represents the hours when the colony will have at least 320,000 bacteria? a.) [2.5, ∞)
b.) [3, ∞)
c.) [32, ∞)
d.) [0, 2.5]